[ncl-talk] Disappearing Dots (Revisited)

Tue Jan 14 12:48:25 MST 2020

Rashed seems to demonstrate that his version works, so I will probably find
the same.  I'll update later.

Thank you for the help.

Barry

On Tue, Jan 14, 2020 at 9:47 PM Barry Lynn <barry.h.lynn at gmail.com> wrote:

> Hi Adam, Rasheed.
>
> In both cases, I call the function within a loop.  The only difference is
> whether I refer to array(i) or arr_0, arr_1... n.
>
> In any case, I will try Rashed's version.
>
> Barry
>
> On Tue, Jan 14, 2020 at 9:06 PM Adam Phillips <asphilli at ucar.edu> wrote:
>
>> Hi Barry,
>> If I had to guess, it is that the arrow function writes the
>> gsn_add_polyline output as attributes named arr,arr1, and arr2 to the plt
>> array that is to be returned by the function. If you call the function
>> multiple times and pass all the graphical output to the same logical array
>> named "array", each time you call arrow, array at arr, array at arr1 and
>> array at arr2 will get overwritten.  To get around this, you should alter
>> the arrow function to use the unique_string function.
>> https://www.ncl.ucar.edu/Document/Functions/Built-in/unique_string.shtml
>>
>> For an example of how to do this, see polymarker example #18:
>> https://www.ncl.ucar.edu/Applications/polyg.shtml#ex18
>>
>> For example, change this:
>> plt at arr = gsn_add_polyline(wks,plt,xpts,ypts,res)
>> to this:
>> str = unique_string("arr")
>> plt@$str$ = gsn_add_polyline(wks,plt,xpts,ypts,res)
>>
>> and do the same for the other two calls to gsn_add_polyline.
>> Hope that helps!
>> Adam
>>
>>
>> On Tue, Jan 14, 2020 at 9:45 AM Barry Lynn via ncl-talk <
>> ncl-talk at ucar.edu> wrote:
>>
>>> Hi:
>>>
>>> I have a bit of a mystery:
>>>
>>> I have a loop where I am calling gsn_add_polymarker. I created an array
>>> (dum_b(n_calls)) so I could plot the markers within the loop.
>>>
>>> dum_b(i) = gsn_add_polymarker(wks,plot,lon_old(i),lat_old(i),mkres)
>>>
>>>
>>> However, when I call:
>>>
>>>
>>> array(i) = arrow(wks,plot,xpts,ypts,mkres)
>>>
>>>
>>> I am not able to make the lines with the arrows (more than once).
>>>
>>>
>>> warning:TransformPostDraw: tfPolyDrawList element 1 is invalid
>>>
>>>
>>> Yet, if I call the same with
>>>
>>>
>>> arr_0 = arrow...
>>>
>>>
>>> arr_1 = arrow...
>>>
>>>
>>> up to n_calls, I have no problem.
>>>
>>>
>>> If someone can solve the mystery, I would be curious to find out the
>>> reason for this "strange" behavior.
>>>
>>>
>>> https://www.ncl.ucar.edu/Support/talk_archives/2010/att-1344/arrow.ncl
>>>
>>> On Mon, Jul 8, 2019 at 12:13 PM Barry Lynn <barry.h.lynn at gmail.com>
>>> wrote:
>>>
>>>> Hi:
>>>>
>>>> That was absolutely the correct solution -- thank you.
>>>>
>>>> Are you aware of a way to increase the spacing between maps?  I am
>>>> using wrf resources so this is very obtuse.
>>>>
>>>> Barry
>>>>
>>>> On Mon, Jul 8, 2019 at 10:44 AM Rashed Mahmood <rashidcomsis at gmail.com>
>>>> wrote:
>>>>
>>>>> Hi Barry,
>>>>> A quick look suggests that it may be related to not specifying unique
>>>>> ids for markid and textid:
>>>>>     markid = gsn_add_polymarker(wks,plots(0),lon,lat,mkres)
>>>>>     textid = gsn_add_text(wks,plots(0),cities,lon,lat,txres)
>>>>>
>>>>> Next lines should have,
>>>>> markid*1 *= gsn_add_polymarker(wks,plots(0),lon,lat,mkres)
>>>>> textid*1* = gsn_add_text(wks,plots(0),cities,lon,lat,txres)
>>>>>
>>>>> and so on...
>>>>>
>>>>> Cheers
>>>>>
>>>>> Rashed
>>>>>
>>>>>
>>>>> On Mon, Jul 8, 2019 at 7:51 AM Barry Lynn via ncl-talk <
>>>>> ncl-talk at ucar.edu> wrote:
>>>>>
>>>>>> Hello:
>>>>>>
>>>>>> For some reason, the markid only appears on the last graph, but not
>>>>>> the first two.  Yet, the "call" to each is the same.  I had this problem in
>>>>>> other programs I wrote.
>>>>>>
>>>>>> If you have a suggestion, thank you,
>>>>>>
>>>>>> Barry
>>>>>> --
>>>>>> Barry H. Lynn, Ph.D
>>>>>> Senior Associate Scientist, Lecturer,
>>>>>> The Institute of the Earth Science,
>>>>>> The Hebrew University of Jerusalem,
>>>>>> Givat Ram, Jerusalem 91904, Israel
>>>>>> Tel: 972 547 231 170
>>>>>> Fax: (972)-25662581
>>>>>>
>>>>>> C.E.O, Weather It Is, LTD
>>>>>> Weather and Climate Focus
>>>>>> http://weather-it-is.com
>>>>>> Jerusalem, Israel
>>>>>> Local: 02 930 9525
>>>>>> Cell: 054 7 231 170
>>>>>> Int-IS: x972 2 930 9525
>>>>>>
>>>>>> _______________________________________________
>>>>>> ncl-talk mailing list
>>>>>> ncl-talk at ucar.edu
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>>>>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>>>
>>>>>
>>>>
>>>> --
>>>> Barry H. Lynn, Ph.D
>>>> Senior Associate Scientist, Lecturer,
>>>> The Institute of the Earth Science,
>>>> The Hebrew University of Jerusalem,
>>>> Givat Ram, Jerusalem 91904, Israel
>>>> Tel: 972 547 231 170
>>>> Fax: (972)-25662581
>>>>
>>>> C.E.O, Weather It Is, LTD
>>>> Weather and Climate Focus
>>>> http://weather-it-is.com
>>>> Jerusalem, Israel
>>>> Local: 02 930 9525
>>>> Cell: 054 7 231 170
>>>> Int-IS: x972 2 930 9525
>>>>
>>>>
>>>
>>> --
>>> Barry H. Lynn, Ph.D
>>> Senior Associate Scientist, Lecturer,
>>> The Institute of the Earth Science,
>>> The Hebrew University of Jerusalem,
>>> Givat Ram, Jerusalem 91904, Israel
>>> Tel: 972 547 231 170
>>> Fax: (972)-25662581
>>>
>>> C.E.O, Weather It Is, LTD
>>> Weather and Climate Focus
>>> http://weather-it-is.com
>>> Jerusalem, Israel
>>> Local: 02 930 9525
>>> Cell: 054 7 231 170
>>> Int-IS: x972 2 930 9525
>>>
>>> _______________________________________________
>>> ncl-talk mailing list
>>> ncl-talk at ucar.edu
>>> List instructions, subscriber options, unsubscribe:
>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>>
>>
>> --
>> Adam Phillips
>> Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR
>> www.cgd.ucar.edu/staff/asphilli/   303-497-1726
>>
>> <http://www.cgd.ucar.edu/staff/asphilli>
>>
>
>
> --
> Barry H. Lynn, Ph.D
> Senior Associate Scientist, Lecturer,
> The Institute of the Earth Science,
> The Hebrew University of Jerusalem,
> Givat Ram, Jerusalem 91904, Israel
> Tel: 972 547 231 170
> Fax: (972)-25662581
>
> C.E.O, Weather It Is, LTD
> Weather and Climate Focus
> http://weather-it-is.com
> Jerusalem, Israel
> Local: 02 930 9525
> Cell: 054 7 231 170
> Int-IS: x972 2 930 9525
>
>

-- 
Barry H. Lynn, Ph.D
Senior Associate Scientist, Lecturer,
The Institute of the Earth Science,
The Hebrew University of Jerusalem,
Givat Ram, Jerusalem 91904, Israel
Tel: 972 547 231 170
Fax: (972)-25662581

C.E.O, Weather It Is, LTD
Weather and Climate Focus
http://weather-it-is.com
Jerusalem, Israel
Local: 02 930 9525
Cell: 054 7 231 170
Int-IS: x972 2 930 9525
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